i am a beginner and any response will help me a lot.
i have 20 types of products,
each product has about 40 fields, most of them are common fileds for all products, but some of them are unique.
the number of the unique fields of all the product types is 75.
the question:
Should i build one products table with 75 fields and leave nulls where a field is not property of a product type?
Or should i build a products table for the 30 common fields and a 20 different tables for each product type extra fields?
Or just build 20 different tables each product type?
When I set the relationship between two tables with a one-to-many relationship and I want all records deleted from the many side when a row is deleted from the one side, how should I set the Insert and Update Specs (Delete and Update) CASCADE or NO ACTION? Then if there is a lookup table on the many side how should it be set?
I have decided to build a Football Pool app as a way of teaching myself asp.net with non code-generating tools. I am stuck on some basic DB design thoughts and would appreciate some feedback. Right now I have pages that let me input some of the initial data like Users, Teams and Game Schedules. I need to be able to record whether a user has paid their weekly entrance fee but I don't know which table to store this info even what datatype would be the best solution. Here is the table design I have so far http://www.insecurepc.com/FootballPoolDBDesign.jpg Before you ask, the users tables would be the asp.net 2.0 mambership ones which are too many to list... Thoughts please. TIA
we have records with login.out of employees. i.e. this is a set of login/out for an employee for 1 day (but the actual data shows 2 dates )
login 1/1/2005 15:00 logout 1/1/2005 16:00 login 1/1/2005 17:00 logout 1/1/2005 18:00 login 1/1/2005 23:00 logout 1/2/2005 1:00 login 1/2/2005 2:00 <-----------this is the reason why we need a new table called schedules logout 1/2/2005 3:00 some employee goes over the next day to finish their shift
I think in order to get the proper Start Time and Stop time we need a new table called schedules.
schedules will contain employee work schedules, kindly help me design how to accomplish this.
question is, will it be for each day?
so I'll have 365 record per employee?
help me design the columns
employeeID, startTime,stopTime, workdate -do I need only four?
Amanda writes "I'm a student currently taking a class working with the SQL database and I'm not doing too well in that class because I'm struggling on some basics. I have worksheets and everything i just need help working on them, and this being and on-line class makes it hard for me to work with my teacher. If someone is willing to work with me one on one through a messaging program or Email that would be great, i can send you the worksheets and we can work it out together."
Hi,Probably a very simple question but I'm afraid my experience at this issomewhat limited so...In a database with a many to one relationship, say orders to customers, isit preferable to have an UID for a customer and store this in the orderstable rather than the customer name, for example.CUSTOMERS++++++++++UID: Name: Address: Postcode: etc01 Alpha 12 Acacia Ave HN7YHH02 Beta 23 Acacia Ave HN6YTH03 Gamma 28 Acacia Ave HN7UYHORDERSCustomer Amount dateAlpha 100 20030823Alpha 250 20030824Beta 90 20030825Alpha 800 20030825Gamma 1000 20030826Or is it is better to have:ORDERSCustomer Amount date01 100 2003082301 250 2003082402 90 2003082501 800 2003082503 1000 20030826Assuming that the second option is the best, how far do I go? I can see howit would beof benifit to do this for orders and customers where there may beseveral hundred thousand orders and hundreds of customers, but for examplewould I need to do this for a customer contact database with titles - egeach title having a UID and using this ID in the customer table?Thanks for taking the time to read this. Any advice is gratefully received.Kind thanksChris S
I am new to this type of programming and and have read all articles on adding an image to the database and it seems they all use sql queries to add an image but I want to add an image at design time. I am using Visual Basic 2005. I am also using Visual Basic 2005 Express Edition to try the same thing. I am trying to build a Translator program for english to Brazilian Portuguese and the reason I want to add the images is so that when I translate the word cat from english to Portuguese, I can also show an image of a cat. Can anyone please help me
Ok, I'm doing a football database for fixtures and stuff. The problem I am having is that in a fixture, there is both a home, and an away team. The tables as a result are something like this:
It's not exactly like that, but you get the point. The question is, can I do a fixture query which results in one record per fixture, showing both teams details. The first in a hometeam field and the second in an away team field.
Fixture contains the details about the fixture like date and fixture id and has it been played
Team contains team info like team id, name, associated graphic
TeamFixture is the table which links the fixture to it's home and away team.
TeamFixture exists to prevent a many to many type relationship.
Make sense? Sorry if this turns out to be really easy, just can't get my head around it at the mo!
I would like to create a table called product. My objective is to get list of packages available for each product in data grid view column while selecting each product. Each product may have different packages type (eg:- Nos, CTN, OTR etc). Some product may have two packages and some for 3 packages etc. Quantity in each packages also may be differ ( for eg:- for some CTN may contain 12 nos or in other case 8 nos etc). Prices for each packages also will be different that also need to show. Â How to design the table..Â
Product name  :  Nestle milk | Rainbow milk packages  : CTN,OTR, NOs |
CTN, NOs Price: 50,20,5 | 40,6
(Remarks for your reference):CTN=10nos, OTR=4 nos  | CTN=8 Nos
This is probably a very silly question.I started learning ASP.net by following ASP.NET Unleashed. I am stuck where he wants me to open a connection to SQL Server database. I have just downloaded MSDE. But I dont know where to type this code and how to run it..so as to connect to the database.
<%@ Import Namespace="System.Data.SqlClient" %>
<Script Runat="Server">
Sub Page_Load Dim conPubs As SqlConnection
conPubs = New SqlConnection( "server=localhost;uid=webuser;pwd=secret;database=pubs" ) conPubs.Open() End Sub
</Script>
Connection Opened!
Now do i have to change the uid to SA ? (i had to assign one when i downloaded and installed MSDE?
am not very experienced in using DTS and really need your help. I have a dts package that i have scheduled to run every day. Here's what i want the package to do:
1. Check whether a value for a certain column in a certain row of a table in my database is 0 or 1. If it is 1, then 2. Run the dts task (which i have created and is working)
In other words, when the package is started, i want to execute a stored procedure or sql task or whatever, and if that returns 1 then i want to continue, if it returns 0 i want to finish the package without running the dts task. I'm sure there's a simple way to do this, but i could use your help...!
I downloaded SQLExpress and Visual Studio Express to my home computer. I built a simple database, adding data through theSQLexpress admin tool. I built a web page using MS Studio. I connected to the database and used the webpage for a few days. Then I restarted the computer. Now the web page won't open, and MS Studio won't open the MDF file in the App_Data folder. I can still see and work in the database through SQL server Express. The web page and the MSStudio attempt to connect to the mdf file both fail with this message: Cannot open user default database. Login failed.Login failed for user 'KAAAK/Administrator'. So it seems to be trying to connect as the Windows user. When I try to modify the connection to connect through a user/password I created in SQL manager, I get a message that the user is not a trusted SQL user. from web.config: <connectionStrings> <add name="ConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|info.mdf;Integrated Security=True;User Instance=True;User ID=Admin;Password=12345" providerName="System.Data.SqlClient"/> </connectionStrings> That was changed from the original string created automatically by MS Studio <connectionStrings> <add name="stocksConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|stocks.mdf;Integrated Security=True;User Instance=True;" providerName="System.Data.SqlClient"/> </connectionStrings> I am sure this is some simple problem, but why would the system refuse to access an mdf file it had already been accessing.? Thanks, Michael
Hi all, having trouble with my first sql communication. I've got hosted service with an SQL database i've populated with a row. When it gets to the third line the page crashes with an error. SqlConnection connection = new SqlConnection("Server=mydbserver.com;Database=db198704784;");// +"Integrated Security=True"); SqlCommand cmd = new SqlCommand("SELECT UserName FROM Users",connection); SqlDataReader reader = cmd.ExecuteReader();
is there somewhere i need to put in my username or password? or is this code just wrong
not sure why I am having trouble here but I am using the following WHERE clause expecting to find all rows where any one of the the three keywords are present. ....WHERE Company.L_Keywords LIKE '%metal%' AND Company.L_Keywords LIKE '%tile%' AND Company.L_Keywords LIKE '%ceramic%' however it appears to finding only the rows where all three words are present in the L_Keywords field
This is a very simple question. How would a select satement be formated in the following example. SELECT Grade, Student_ID, First_Name, Last_Name FROM Scores WHERE (This is where I'm stuck and I know this is not the right formatting although I wish it were because it would make my life a little bit easier.) Student_ID = 115485, 115856, 568547, 965864, etc... I may have up to 100 specific student ids to put in this one statement. I know I can use the "WHERE Student_ID = 115485 OR Student_ID = 115856, OR Student_ID = 568547" but that would be alot of waste. Seems like there should be an easier way than using the "OR Student_ID =" for every entry. Can someone explain another way I can do this. Thanks in advance.
Hey, I have a pretty simple question.My query is throwing an error saying "Invalid column name 'subject'."The problem is that subject is a custom column I've made, well just look at the sql:SELECT a.ArticleID, subject=ISNULL((select subject from subjects),'') where subject='some subject'
I have already created package which loads a text file to database using the dts wizard in Enterprise Manager.How do I execute that package using visual basic?Please provide the Code!!!Thanks
Hi there. I am trying to use MDX code to create a measure in ProClarity. Please help!!
A store can be one of a number of ‘Brands’. The MDX segment below gives me the Sales Value of a selected item, but for Store Brand 'Brand1' only. This works fine - but how do I add a brand? That is, how do I see the combined Sales Value for the selected item for 'Brand1' and 'Brand2'?
Hoping someone could me with an ongoing indexing question that I have.
On my site, we have over the past 5 years developed what is emerging as a fairly complicated dbase structure, as features have been added to my site and relations have increased between different database tables, there has been a need to index fields in different ways, and in some instances field indexing has overlapped. For example we may have a table that has 5 fields (field1,field2,field3,field4,field5). A need to index field1 is requried because of a query that reads:
SELECT * From Table1 where field1=XXXXX
Additionally there may be a need to for another query that reads:
SELECT * From Table1 where field2=XXXXX
In this instance an index is placed on field2.... But, for example when there is the following query:
SELECT * From Table1 where field1=XXXXX and field2 = XXXXX
Is it necessary to set a new index on: field1,field2 ???
We have made the choice that yes, in fact there is...but now over time some of our tables have instances of single fields being indexed along with combinations of two single fields that have already been indexed, being indexed together. As tables have grown to over 1,000,000 records and having up to 15 or so indexes, we realize that the number of indexes maybe degrading performance. Also, indexes vary in type, e.g INT,BIGINT,Varchar fields... In the above instance, can we eliminate the multi-indexes and improve performance over all...?
On a second related question:
In the event that two tables are joined on a common field.
e.g. Select * from Table1,Table2 where Table1.field1=Table2.field1
Is it necessary to index both of these fields in tables: Table1 and Table2 ?
Hope someone can help, as we are looking to improve the efficiency of our tables as they continue to grow.
I need help. 160821A network error was encountered while sending results to the front end. Check the SQL Server errorlog for more information. I need help. Our SQL Server is crashing. The Database is still recovering. I can not kill any Process when the Server crashed. I shoot down and restarted the server. Nothing to do. I can not access to the database. It is recovering. How long? I do not know. What can be the reason of the recovering? Nor the event log of Windows NT or the log files of the SQL SERVER can help me.
Here is a part of the log file
23216Arithmetic overflow error for type %s, value = %f.
10915There are more columns in the INSERT statement than values specified in the VALUES clause. The number of values in the VALUES clause must match the number of columns specified in the INSERT statement.
99/01/19 01:14:25.69 spid25 bufwait: timeout, BUF_IO, bp 0x1bba600, pg 0x11b50, stat 0x801000/0x6, obj 0x23494814, bpss 0x124a2a0 99/01/19 01:14:27.15 ods Error : 17824, Severity: 10, State: 0 99/01/19 01:14:27.15 ods Unable to write to ListenOn connection '.pipesqlquery', loginname 'sa', hostname 'myserver'. 99/01/19 01:14:27.15 ods OS Error : 232, The pipe is being closed.
I have many views and views on these views. Is there anyone out there who might have a suggestion as to how I can keep them straight so that I won't lose track of what I made them for? I am starting to not remember why I made some, so I have to go back and try and remember. Any suggestion would be appreciated.
I have a new pc with xp on it,I have been coping data,files,projects,etc from my old pc onto my new over the network.
If I open Query Analyzer my databasese are there and it is all fine,but if I open ODBC I have no databases under System DSN. How do I go about that,I have many databases and tables in it,is there a way I can refresh it or something,it would have to be something simple,right???
Hi, can somebody help me with some verification SQL commands that I need to run on an Oracle database?
In the Oracle table 'FEE', if the 'FEETYPE' column has a value of '3' for a record, then the 'PERCENTAMOUNT' column needs to be not null for that row - can somebody put this into a command for me so I can make lots like it?
another one I have is in the 'FEE' table, if the 'FEETYPE' column has a value of '1', the 'PERIOD' column needs to always have a value of '3' for that row - is there a command that can check the records that do/do not have this information?
I was just looking for opinions on the best place to pick up SQL skills. Community college course? Online courses? Grad school? I've finished undergrad, if that helps anyone have an idea of my current situation.
I have only been working with SQL for short time. My question is probably a basic one but I would appreciate the assistance!
The scenario is I have two different tables AVCfids (on ACC database)& AVCfids (on ACC.archive database). I am trying to write a command in SQL server agent (jobs) to transfer the data on a daily basis from AVCfids to ACC.archives. The script I have created but is not working is:
